Honda CRF450X 2010 User Manual

c.
If the camshaft
contact surface of
the rock er arm is
damaged or
abnormally worn ,
check the cam
lobes for damage
(page 9--20) .
Remove the snap ring.
Remove the
camshaft from the camshaft holder.
I NOTICE I
Make sure the intake lobes are facing up when
removing the camshaft from the holder to prevent
damaging the intake lifter bores.
INSPECTION
ROCKER ARM
Inspect the camshaft contact surface of the rocker
arm for wear or damage.
Measure the rocker arm 1.0.
SERVICE LIMIT : 12.05 mm (0.474 in)
ROCKER ARM SHAFT
Inspect
the r ocker arm shaft for wear or damage.
Measure the rocker arm shaft 0.0.
SERVICE LIMIT: 11 .92 mm (0.469 in)
Calculate the rocker arm-te-shaft clearance.
SERVICE LIMIT: 0. 10 mm (Q . OO4 in)
CYLINDER HEADIV ALVES
CA' '.1S'HA ' 'T HOLDER
9-19

Honda CRF450X 2010 Specifications

General

Engine Type	449cc liquid-cooled single-cylinder four-stroke
Bore and Stroke	96mm x 62.1mm
Compression Ratio	12.0:1
Transmission	Wide-ratio five-speed
Final Drive	#520 chain; 13T/51T
Front Suspension	47mm inverted Showa cartridge fork with 16-position rebound and 16-position compression damping adjustability; 12.4 inches travel
Front Brake	Single 240mm disc with twin-piston caliper
Rear Brake	Single 240mm disc
Front Tire	80/100-21
Rear Tire	110/100-18
Wheelbase	58.3 inches
Fuel Capacity	1.9 gallons
Ignition	Solid-state CD with electronic advance
Rear Suspension	Pro-Link Showa single shock with spring preload, 17-position rebound damping adjustability, and 13-position compression damping adjustability; 12.4 inches travel
Rake	27.38 degrees